[PATCH] contrib/ivshmem-server: allow 2G ivshmem region

[PATCH] contrib/ivshmem-server: allow 2G ivshmem region

[Erika Hunhoff]

The ivshmem-server failed when configured with the following:
./ivshmem-server -F -S ivshmem-file -l 2G
This is because the ivshmem_server_ftruncate fails without calling
ftruncate.
This commit allows the ivshmem-server to create a region of size 2G.

Signed-off-by: Erika Hunhoff <hunhoff.erika@gmail.com>
---
 contrib/ivshmem-server/ivshmem-server.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/contrib/ivshmem-server/ivshmem-server.c b/contrib/ivshmem-server/ivshmem-server.c
index 2f3c7320a6..ef31f07914 100644
--- a/contrib/ivshmem-server/ivshmem-server.c
+++ b/contrib/ivshmem-server/ivshmem-server.c
@@ -239,13 +239,17 @@ ivshmem_server_ftruncate(int fd, unsigned shmsize)
         return 0;
     }
 
-    while (shmsize <= IVSHMEM_SERVER_MAX_HUGEPAGE_SIZE) {
+    /*
+     * This is a do-while loop in case
+     * shmsize > IVSHMEM_SERVER_MAX_HUGEPAGE_SIZE
+     */
+    do {
         ret = ftruncate(fd, shmsize);
         if (ret == 0) {
             return ret;
         }
         shmsize *= 2;
-    }
+    } while (shmsize <= IVSHMEM_SERVER_MAX_HUGEPAGE_SIZE);
 
     return -1;
 }
-- 
2.25.1